<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta content="text/html; charset=utf-8" http-equiv="content-type" />
    <title>Google Maps JavaScript API Example</title>

    <script src="http://maps.google.com/maps?file=api&amp;v=2&amp;key=ABQIAAAANPIaB8wZJZ0vTHZEWI49-hT2yXp_ZAY8_ufC3CFXhHIE1NvwkxTWOk3nE0FE4j6Y7Z5vOYb-W6E5rA"
        type="text/javascript"></script>

    <script type="text/javascript">
    //<![CDATA[
    function load() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("map"));
        map.setCenter(new GLatLng(37.4419, -122.1419), 13);
      }
    }
    //]]>
    </script>

</head>
<body onload="load()" onunload="GUnload()">
    <div id="map" style="width: 500px; height: 300px">
    </div>
</body>
</html>
Check out the API documentation for more information. 